I'm reading Memory Disorders in Psychiatric Practice by German E. Berrios and John R. Hodges (2000). The section on The Ganser Syndrome has this table (from page 449) contrasting Schizophrenia and the The Ganser Syndrome. The third row of the table reads:
\begin{array}{c|c|c|} & \text{Ganser Syndrome} & \text{Schizophrenia } \\\hline \text{Return to previous personality possible} & \text{Yes} & \text{No} \\\hline \end{array}
The book doesn't elaborate as to how a return to previous personality is not possible in Schizophrenia. My own (weak) understanding was that some people do make a full and complete recovery indefinitely - taking that to mean a return to previous personality happens. I would appreciate if someone could elaborate or share a source that provides an explanation for this claim.
Is a return to previous personality possible in Schizophrenia?